<html><head><title>The Fish Species Data files for GAMLSS</title>
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<h2>The Fish Species Data files for GAMLSS</h2>


<h3>Description</h3>

<p>
species: The number of different fish species (<code>y=fish</code>) was recorded for 70 lakes of the world together with 
explanatory variable <code>x=log(lake)</code> area.  The data are given and analyzed by Stein and Juritz (1988).
</p>


<h3>Usage</h3>

<pre>

data(species)

</pre>


<h3>Format</h3>

<p>
Data frames each with the following variable.
<dl>
</p>

<dt><code>fish</code></dt><dd>a numeric vector showing the number of different species in 70 lakes in the word</dd>
<dt><code>lake</code></dt><dd>a numeric vector showing the lake area</dd>

<p>
</dl>

<h3>Details</h3>

<p>
Data sets usefull for the GAMLSS booklet
</p>


<h3>References</h3>

<p>
Stein, G. Z. and Juritz, J. M. (1988). Linear models with an inverse Gaussian-Poisson
error distribution. <EM>Communications in Statistics- Theory and Methods</EM>, <B>17</B>, 557-571.
</p>


<h3>Examples</h3>

<pre>

data(species)
with(species, plot(fish~log(lake)))

</pre>



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